1. Atlas digital de Costa Rica (CD-ROM);ITCR (Instituto Tecnológico de Costa Rica),2014
2. Standard Test Method for Small Clear Specimens of Timber;ASTM D143-14,2014
3. Standard Test Methods for Direct Moisture Content Measurement of Wood and Wood-Base Materials;ASTM D4442-07,2007
4. Standard Test Methods for Water Solubility of Wood;ASTM D1110-84,2013
5. Standard Test Method for Ethanol-toluene Solubility of Wood;ASTM D1107-96,2013